# Relationship history for MSHA mine 0202533

Current hierarchy: **Ebasco Constructors Inc & Losinger Usa Inc → Ebasco-Losinger J/V → Aggregate Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Ebasco-Losinger J/V → Aggregate Plant; 1990-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ebasco Constructors Inc & Losinger Usa Inc → Aggregate Plant; 1990-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ebasco Constructors Inc & Losinger Usa Inc → Ebasco-Losinger J/V; 1990-09-01 to current/open; source msha-controller-operator-history